161036421015 has 32 divisors (see below), whose sum is σ = 266978301120. Its totient is φ = 82789088256.

The previous prime is 161036420981. The next prime is 161036421031. The reversal of 161036421015 is 510124630161.

It is a happy number.

It is not a de Polignac number, because 161036421015 - 2⁸ = 161036420759 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35302 + ... + 568611.

It is an arithmetic number, because the mean of its divisors is an integer number (8343071910).

Almost surely, 2^161036421015 is an apocalyptic number.

161036421015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161036421015 is a deficient number, since it is larger than the sum of its proper divisors (105941880105).

161036421015 is a wasteful number, since it uses less digits than its factorization.

161036421015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604563.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 161036421015 in words is "one hundred sixty-one billion, thirty-six million, four hundred twenty-one thousand, fifteen".